I'm guessing art for art's sake because that's what someone said.
On signs for example hiring or for logo and emphasizing certain letters or having different parts pop out more
The answer is D. They are realistic and show the American West. The reason is because, well, that is what Albert Bierstadt painted. Albert was from Germany, but he made several journeys to the west and made paintings of what he saw.
Wow that sounds really cool!